碱性品红法直接测定食品中吊白块含量  被引量:1

Basic Fuchsine Method for the Direct Determination of Sodium Formaldehyde Sulfoxylate in Foods

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作  者:陈灵燕[1] 张停[1] 施冬冬[1] 郑云法[1] 

机构地区:[1]丽水学院,浙江丽水323000

出  处:《广州化工》2013年第9期144-145,166,共3页GuangZhou Chemical Industry

基  金:浙江省新苗人才计划基金(No:2012R429011)

摘  要:基于吊白块溶液或含吊白块的样品蒸馏液遇氢氧化钠,游离出二氧化硫和甲醛,与碱性品红反应生成一种紫红色物质,在560 nm处有最大吸收,在一定浓度范围内吸光度与吊白块的含量成一定线性关系。在选定的条件下,该方法的线性范围为0.018~0.70 mg。其响应值与吊白块含量呈强相关性,线性回归方程为Y=0.8862X+0.0165,r=0.9991,回收率97.5%~102.0%,检出限0.005 g/L,RSD=4.4%。结果满意。Based on the sodium formaldehyde sulfoxylate solution or contain sodium formaldehyde sulfoxylate sample distillation fluid in sodium hydroxide, the free SO2 and formaldehyde, and fuchsine reaction to generate a purple material, and in the 560 nm place had the largest absorption. A certain concentration range absorbance and the content of sodium formaldehyde sulfoxylate had a certain linear relationship. The selected conditions, the method of linear range was 0. 018 - 0. 7 mg, its response value and the content of sodium formaldehyde sulfoxylate was strong correlation, linear regression equation for Y =0. 8862 X +0. 0165, r =0. 9991 and the recoveries of 97. 5% -102. 0%, the detection limit of 0. 005 g/L, RSD of 4. 4%, with satisfactory results.

关 键 词:分光光度法 吊白块 碱性品红 

分 类 号:O657.32[理学—分析化学]

 

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